Interference Suppression System and Method

1. An interference suppression system comprising: an antenna; a control module; a receiving and sending module, coupled to the antenna; a radio frequency (RF) sending channel, coupled between the receiving and sending module and the control module; a power amplifier (PA), set in the RF sending channel, comprising a PA output end and a PA input end; a RF receiving channel, coupled between the receiving and sending module and the control module; a first filter module with a first band stop filter (BSF), comprising a first filter module input end coupled to the PA output end, a first filter module output end coupled to the PA input end, and a first filter control end coupled to the control module; and a power detecting module, coupled to the control module and the PA output end, configured to detect a first RF sending power outputted by the PA; wherein, the control module is configured to adjust a first filter module frequency band according to the first RF sending power outputted by the PA, resulting in the first filter module feeds back a signal to the PA input end; and when the control module determines the first RF sending power is greater than a first preset power, the control module continuously adjusts a first BSF frequency band until the first RF sending power is less than the first preset power.

2. The interference suppression system of claim 1 , the receiving and sending module comprising an antenna transceiver switch.

3. The interference suppression system of claim 1 , further comprising: a first switch, coupled between the RF receiving channel and the PA output end; and a second switch, set in the RF receiving channel, coupled to the control module.

4. The interference suppression system of claim 3 , the first filter module comprising the first band stop filter (BSF), coupled to the PA input end and the control module, configured to filter interference out of a particular operating frequency band.

5. The interference suppression system of claim 3 , the control module further comprising a received signal strength indicator (RSSI) module.

6. The interference suppression system of claim 4 , wherein the control module turns on the second switch and turns off the first switch, and when the control module determines the first RF sending power is greater than a first preset power, the control module continuously adjusts a first BSF frequency band until the first RF sending power is less than the first preset power.

7. The interference suppression system of claim 5 , further comprising a second filter module, coupled to the PA output end and the PA input end.

8. The interference suppression system of claim 5 , further comprising a LNA (Low Noise Amplifier), with a LNA input end coupled to the receiving and sending module, and a LNA output end coupled to the second switch, the LNA input end.

9. The interference suppression system of claim 7 , the second filter module comprising a third band pass filter (BPF) and a fourth BPF, the fourth BPF coupled to the control module.

10. The interference suppression system of claim 8 , further comprising a third filter module, coupled to the LNA output end and the LNA input end.

11. The interference suppression system of claim 9 , wherein the control module turns on the first switch and turns off the second switch, and the RSSI module detects a second RF sending power outputted by the PA, when the control module determines the second RF sending power is greater than a second preset power, the control module continuously adjusts a fourth BPF frequency band until the second RF sending power is less than the second preset power.

12. The interference suppression system of claim 10 , the third filter module comprising a second BSF and fifth BPF, the second BSF coupled to the control module.

13. The interference suppression system of claim 11 , the second filter module comprising a first amplifier coupled to the third BPF, the fourth BPF and the PA input end, and configured to amplify a third BPF output signal and a fourth BPF output signal.

14. The interference suppression system of claim 12 , wherein the RSSI module is further configured to detect RF receiving power outputted by the LNA; the control module is further configured to adjust a second BSF frequency band according to the RF receiving power.

15. The interference suppression system of claim 14 , wherein the control module turns off the first switch and turns on the second switch, when the control module determines the RF receiving power is less than a third preset power, the control module continuously adjusts the second BSF frequency band until the RF receiving power is greater than the third preset power.

16. The interference suppression system of claim 15 , the third filter module further comprising a second amplifier coupled to the fifth BPF and the LNA input end, configured to amplify a fifth BPF output signal.

17. An interference suppression system comprising: an antenna; a control module; a receiving and sending module, coupled to the antenna; a radio frequency (RF) sending channel, coupled between the receiving and sending module and the control module; a power amplifier (PA), set in the RF sending channel, comprising a PA output end and a PA input end; a RF receiving channel, coupled between the receiving and sending module and the control module; a first switch, coupled between the RF receiving channel and the PA output end; a second switch, set in the RF receiving channel, coupled to the control module, a first filter module with a first band stop filter (BSF), comprising a first filter module input end coupled to the PA output end, a first filter module output end coupled to the PA input end, and a first filter control end coupled to the control module; and a power detecting module, coupled to the control module and the PA output end, configured to detect a first RF sending power outputted by the PA; wherein, the control module is configured to adjust a first filter module frequency band according to the first RF sending power outputted by the PA, resulting in the first filter module feeds back a signal to the PA input end; and the control module turns on the second switch and turns off the first switch, and when the control module determines the first RF sending power is greater than a first preset power, the control module continuously adjusts a first BSF frequency band until the first RF sending power is less than the first preset power.